Reduction of hydrogen sulfide by recirculation of effluents in stabilization ponds with the presence of microalgae

Authors

  • Isaías López-Hernández Unidad Región Laguna-Universidad Autónoma Agraria Antonio Narro. Periférico Raúl López Sánchez s/n, Colonia Valle Verde, Torreón, Coahuila, México. CP. 34056.
  • Natalia Belén Ortega-Morales Unidad Región Laguna-Universidad Autónoma Agraria Antonio Narro. Periférico Raúl López Sánchez s/n, Colonia Valle Verde, Torreón, Coahuila, México. CP. 34056
  • Sergio Arturo Ortiz-Diaz Instituto Tecnológico de Torreón-Doctorado en Agua y Suelo. Carretera Torreón-San Pedro km 7.5, Ejido Ana, Torreón, Coahuila, México. CP. 27170
  • Eduardo Aron Flores-Hernandez Unidad Región Laguna-Universidad Autónoma Agraria Antonio Narro. Periférico Raúl López Sánchez s/n, Colonia Valle Verde, Torreón, Coahuila, México. CP. 34056.
  • Laura Andrea Pérez-García Instituto Tecnológico de Torreón-Doctorado en Agua y Suelo. Carretera Torreón-San Pedro km 7.5, Ejido Ana, Torreón, Coahuila, México. CP. 27170
  • Miguel Medrano-Santillana Unidad Región Laguna-Universidad Autónoma Agraria Antonio Narro. Periférico Raúl López Sánchez s/n, Colonia Valle Verde, Torreón, Coahuila, México. CP. 34056.

DOI:

https://doi.org/10.29312/remexca.v13i1.3096

Keywords:

effluent recirculation, wastewater treatment

Abstract

Stabilization ponds (SPs) are used as an alternative for wastewater treatment; however, one of their disadvantages is the emission of bad odors caused by hydrogen sulfide (H2S), which is highly toxic and corrosive, in addition to causing damage to the health of the surrounding population and negatively affecting the metallic structures and electrical equipment exposed. This problem is a priority to be solved in order to continue with the operation of wastewater treatment plants. In this study, a procedure based on the recirculation of 20% of the effluent, which contains native microalgae, is presented as a solution alternative. To determine the optimal percentage of effluent recirculation, a series of recirculation tests were implemented through the jar method and subsequently it was taken to a macro scale, evaluating the performance of the effluent recirculation, comparing the monthly averages of 2019 before the implementation of the project with 2020 already operating. The results showed significant changes in the percentages of pollutant removal, in the biochemical oxygen demand, of 20.8%, total suspended solids, 22.17%, fats and oils, 29.5% and a reduction in fecal coliforms, 91.4%, in addition to reducing H2S with 48.9%, which reduces unpleasant odors and the potential toxic effect on health. We can conclude that the methodology is efficient in improving the parameters, thus complying with the standards of the applicable regulations.

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Published

2022-02-08

How to Cite

López-Hernández, Isaías, Natalia Belén Ortega-Morales, Sergio Arturo Ortiz-Diaz, Eduardo Aron Flores-Hernandez, Laura Andrea Pérez-García, and Miguel Medrano-Santillana. 2022. “Reduction of Hydrogen Sulfide by Recirculation of Effluents in Stabilization Ponds With the Presence of Microalgae”. Revista Mexicana De Ciencias Agrícolas 13 (1). México, ME:29-40. https://doi.org/10.29312/remexca.v13i1.3096.

Issue

Vol. 13 No. 1 (2022)

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Articles

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